Seems that the following bugs have not yet been fixed
1) If you have finishd the quests with Barbara (bought the toys, outfit, mask and done the videos etc), if you talk to her on a weekend at 09:00 in kitchen while cleaning, the quest resets and you start all over again
2) If you finished the quest for Fred (decided who to be with), if at any point you excercise again in the gym (as other people pointed before) the variable "tren_stage" goes to 13 and you get the constant "Takl to Fred"
For now, i have to remember never to talk to barbara in kitchen on weekend morning and never excercise again in gym until those bugs are fixed